search_geodesic: Search for most interesting projection along random geodesics.
Description
This is a novel method for finding more interesting
projections for the guided tour. It works by first
taking a small step in n random directions, and
then picking the direction that looks most promising
(based on the height of the index function). Once the
best direction is found, it performs a linear search
along the geodesic in that direction, traveling up to
half way around the sphere.Usage
search_geodesic(current, alpha = 1, index, max.tries = 5,
n = 5)Arguments
current
starting projection
alpha
maximum distance to travel (currently
ignored)
index
interestingness index function
max.tries
maximum number of failed attempts before
giving up
n
number of random steps to take to find best
direction
Details
You should not to have call this function directly, but
should supply it to the guided_tour as a
search strategy.